The Noise Reduction Ear Muffs are designed for optimal sound proofing, with an NRR rating of 25dB and built-in noise cancelling technology. Equipped with a 3.5mm jack, these headphones are perfect for both adults and kids to use for audio listening in loud environments. Whether you're shooting a gun, mowing the lawn, or engaging in other activities with noise intensity over 100dB, these ear muffs provide essential hearing protection. They are suitable for a variety of situations, including hunting, house renovation, construction sites, demolitions, and woodworking.

Features:

Cushioned Earmuffs - Featuring soft, sponge inner lining for ultimate comfort and reduced pressure

Adjustable Steel Wire Headband - Customize the length of the steel wire to fit your head snugly

Digital Noise Reduction - The built-in environmental microphone automatically reduces background noise above 85dB, protecting your hearing from potential damage

Leatherette Headband - A combination of soft sponge and leather material, reducing pressure on the head for a comfortable fit

Minimalist Design - Sleek and simple packaging for a minimalist and attractive look

3.5mm Audio Port - Connect to external audio players or communication devices with ease

Instructions:   

Not only do these earmuffs reduce unwanted noise but they also let you hear everything that's going on around you clearly. Adjust the volume just right for your needs. Safe sound is amplified using two high-gain microphones on the earcups for clear omnidirectional hearing; low-end frequencies are boosted for accurate, natural sound. 

1. Power on: Long press the switch button for about 2 seconds, hear the voice announcement Power ON.
2. Volume Control: Short press or long press volume + to increase the volume, short press or long press volume - to reduce the volume. Adjust the maximum or minimum volume with a "di" announcement
3. Turn off the power: Long press the switch button for about 3 seconds, hearing the voice announcement Power OFF. 

Headphone Warning: 

All hearing protection affords limited protection. The user is responsible for the proper selection, use, care, and maintenance of this device. Improper selection (including under/over protection), use or maintenance may lead to serious hearing loss. 

Do not allow liquids to enter the earmuffs as this may cause damage. 

Battery Installation:

1. Find the battery compartment on the earmuffs and open the battery compartment cover
2. Insert the battery into the battery compartment in the correct polarity direction (usually, the end with a spring is the negative pole), and bend it inward when inserting it into the battery compartment.
3. Close the battery compartment cover to ensure it is secure and not loose.

Battery Warning:

This product does not contain batteries. Please purchase and install the suitable battery before use. 

1. Before installing the batteries, be sure to read and understand the batteries' installation and usage instructions.
2. Please use batteries that match the product specification, incorrect battery type may result in reduced performance or damage to the product. 
3. Do not mix batteries of different types, brands, or capacities. This may cause batteries leakage, explosion, or product failure.
4. If the batteries leak, heat up, deform, or are otherwise abnormal, stop using the product immediately and follow the batteries' manufacturer's recommendations.
5. When replacing the battery, please make sure the product is turned off and follow the instructions on the manual.
6. Do not expose batteries to high temperature, fire, or high humidity to prevent battery damage or danger.
7. Do not throw batteries into fire or otherwise mistreat them in any way. Dispose of used batteries properly to protect the environment.
8. Please keep batteries in a safe place to prevent children or pets from eating or misusing it. 

Way to Adjust the Headband

Adjust the Size of the Headband

1. Place earcups over each ear.
2. Adjust the headband by sliding the headband up or down.
3. Pay attention to check whether the earmuffs completely cover the ears to ensure the best noise reduction effect.

Incorrect way to wear earmuffs

1. Wear the earmuffs on only one ear, or put the earmuffs on the back of your head.
2. Put the earmuffs on the hair.
3. The headband is not adjusted which makes the earmuffs not fit properly close to the ears and affects the noise reduction effect.

Foldable Design for Easy Carrying

Step 1: Adjust the telescopic adjustment rod to the shortest length, then align the two earcups, the state is vertical with the headband.

Step 2: Hold the headband, pinch the two earcups, push them into the headband and fold from the bottom to the top.

Step 3: Secure the folded earmuffs by using the adjustable headband, making sure they are secure and won't unfold during transportation.

Step 4: Store in a safe place, such as a bag or case, to protect the earmuffs while on-the-go.

Properly wearing and storing your earmuffs is essential for maximizing their noise reduction capabilities. It is important to adjust the headband so that it fits comfortably over your head and covers both ears completely. This will ensure that outside noise is blocked out effectively.

Parts:

• Battery compartment
• Foam + PU padded ear cushions
• Pick-up potentiometer volume
• On/Off button & Volume Up/Down buttons
• Digital microphones
• Earphone jack
• Additional headbands (optional)

Technical Parameters:

Noise Reduction Level: 25dB
Speaker Sensitivity: ≥90dB @ 1.0KHz
Speaker Impedance: 35 ohm
Pickup Enhancement: ≥12dB
Operating Time: ≥12h
Battery Power Supply: 1.5V AAA*2
Operating Temperature: -20°C~~60°C
Protection Level: IP54

Noise Reduction Rating: 25 (when used as directed)